KS steel grades — 823 designations — Page 9
Every grade designated under KS, with the identifying and comparative data we hold for each. Open a grade for its full composition, properties and its designations in other standards. Unless marked, every name here is an asserted identity — the same grade under this standard’s own designation. 15 of 50 rows differ and carry an “Indicative” mark.
Also known as
823 designations| Grade | Category | C% by weight |
|---|---|---|
| STBH340 | — | ≤ 0.18 |
| STBH410 | — | ≤ 0.32 |
| STBH510 | — | ≤ 0.25 |
| STC105 | Unalloyed tool steels / carbon steels | 1–1.1 |
| STC120 | Unalloyed tool steels / carbon steels | 1.15–1.25 |
| STC140 | Unalloyed tool steels / carbon steels | 1.3–1.5 |
| STC2 Indicative | — | 1.15–1.24 |
| STC3 Indicative | Unalloyed tool steels / carbon steels | 1–1.1 |
| STC3 Indicative | Unalloyed tool steels / carbon steels | 0.85–0.95 |
| STC4 Indicative | Unalloyed tool steels / carbon steels | 0.85–0.95 |
| STC5 Indicative | Unalloyed tool steels / carbon steels | 0.75–0.85 |
| STC6 Indicative | Unalloyed tool steels / carbon steels | 0.75–0.85 |
| STC60 | Unalloyed tool steels / carbon steels | 0.55–0.65 |
| STC65 | Unalloyed tool steels / carbon steels | 0.6–0.7 |
| STC70 | Unalloyed tool steels / carbon steels | 0.65–0.75 |
| STC75 | Unalloyed tool steels / carbon steels | 0.7–0.8 |
| STC80 | Unalloyed tool steels / carbon steels | 0.75–0.85 |
| STC85 | Unalloyed tool steels / carbon steels | 0.8–0.9 |
| STC90 | Unalloyed tool steels / carbon steels | 0.85–0.95 |
| STC95 | Unalloyed tool steels / carbon steels | 0.9–1 |
| STD1 | — | 1.9–2.2 |
| STD1 Indicative | Tool steels for cold work | 1–1.1 |
| STD1 Indicative | Tool steels for cold work | 1.9–2.2 |
| STD10 | — | 1.45–1.6 |
| STD11 | — | 1.4–1.6 |
| STD11 Indicative | Tool steels for cold work | 1.45–1.6 |
| STD12 | — | 0.95–1.05 |
| STD2 | — | 2–2.3 |
| STD4 | — | 0.25–0.35 |
| STD5 | — | 0.25–0.35 |
| STD5 Indicative | Tool steels for hot work | 0.25–0.35 |
| STD6 | — | 0.32–0.42 |
| STD6 Indicative | Tool steels for hot work | 0.33–0.41 |
| STD61 | — | 0.35–0.42 |
| STD61 Indicative | Tool steels for hot work | 0.35–0.42 |
| STD62 | — | 0.32–0.4 |
| STD7 | — | 0.28–0.35 |
| STD8 | — | 0.35–0.45 |
| STF3 | — | 0.5–0.6 |
| STF4 | — | 0.5–0.6 |
| STF4 Indicative | Tool steels for cold work | 0.5–0.6 |
| STF6 | — | 0.4–0.5 |
| STH330 | — | ≤ 0.15 |
| STH446 | — | ≤ 0.2 |
| STH660 | — | ≤ 0.08 |
| STHA12 | — | 0.1–0.2 |
| STHA13 | — | 0.15–0.25 |
| STHA20 | — | 0.1–0.2 |
| STHA20 Indicative | Case hardening steels | 0.13–0.17 |
| STHA20 Indicative | Heat-resistant structural steels | 0.08–0.18 |
This grade’s own name — recorded in our sources as this grade’s own designation under that standard.
Indicative — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.
Withdrawn — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.